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Finding the Fourth Proportional to 92,406.40, 138,350.40 and 89,814.40

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Solution

The fourth proportional to 92,406.40, 138,350.40 and 89,814.40 is: 134,469.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,406.40 : 138,350.40 = 89,814.40 : x
  2. Step 2: Convert to fraction form
    92,406.40/138,350.40 = 89,814.40/x
  3. Step 3: Cross multiply
    92,406.40x = 138,350.40 × 89,814.40
  4. Step 4: Simplify right side
    92,406.40x = 12,425,858,165.76
  5. Step 5: Solve for x
    x = 12,425,858,165.76/92,406.40
  6. Step 6: Final answer
    x = 134,469.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.